JPS6137013B2 - - Google Patents

Abstract

A device for securing a sleeve on the abutting ends of two axially aligned reinforcing bars includes an upper device part, a lower device part aligned below the upper device part and a drawing die mounted on the lower device part. Cylinder-piston units interconnect the upper and lower device parts for moving the drawing die over the sleeve and coupling the reinforcing bars together. The cylinder-piston units are disposed in parallel relation to one another and to the axis of the drawing die. At least one cylinder-piston unit provides the drawing force and another provides a counteracting force. The cylinder-piston units are both located on the same side of the drawing device axis and are spaced at different distances from the drawing die axis.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention is a device for abutting and joining two reinforcing rods having protrusions on their surfaces with a sleeve, and the upper part of the machine is parallel to the axis of the reinforcing rod and presses down the sleeve. A drawing die is provided at the bottom of the machine, and during the relative movement between the drawing die and the sleeve caused by the operation of the cylinder/piston units, The present invention relates to a device in which the sleeve is pressed onto the end of the reinforcing bar by means of this drawing die.

A so-called press sleeve joint is known for joining two reinforcing rods at their ends. In that case, a sleeve is attached to the ends of the two rods to be connected, and the inner surface of the sleeve is brought into direct contact with the outer surface of the reinforcing rod by using a force that acts from the outside in a radial direction on the axis of the reinforcing rod. It is transformed like this. The deformation of the sleeve can be carried out over the entire length of the sleeve in one step by rolling between corresponding rollers or by the use of radial pressure using suitable tools, or stepwise in several steps.

Reinforcement bars, ie deformed steel bars for concrete, have surface protrusions in the form of tabs to improve bonding with the concrete in which they are embedded. Such surface projections will of course also improve the shear bond between the reinforcing rod and the sleeve, provided that it is ensured that the material of the sleeve sufficiently surrounds the surface projections of the reinforcing rod.
However, this cannot always be achieved with known devices which always apply deforming pressure to the sleeve only in the radial plane. For manufacturing reasons, projections are made on two opposite sides of hot-rolled reinforcing bars. In particular, if one rod is already embedded in concrete before attempting to connect the other rods, the direction of pressure application during sleeve deformation may be
The ribs in different planes of the two rods are determined to be completely captured. To achieve this, it is known to deform each cross-section of the sleeve in several different radial directions, but twice as many steps are required.

Finally, it is also known to deform the sleeve by pressing it with a drawing die. In the drawing die, the diameter of the sleeve is reduced in the same way as in the case of drawing wire. In this case, an entirely radial deformation pressure is applied to the sleeve. This all-over pressure results in the sleeve fully abutting the entire surface of the reinforcing rod.

Now, in architectural engineering, it is necessary to be able to perform this connection of reinforcing bars to the building itself on site. That is why, for example, it is often necessary to connect a reinforcing rod to the end of a reinforcing rod that emerges from the concrete and is already embedded in the concrete. The equipment for making such press sleeve joints must not only be portable, but also include a plurality of reinforcing rods placed adjacent to each other at the minimum distance necessary for construction or above. It must also be constructed in such a way that press sleeve butts can also be carried out in certain cases.

The known device of the type mentioned at the beginning consists of two symmetrical parts. These two parts are abutted on both sides of one reinforcing rod, and both of the reinforcing rods must be able to be connected to each other with a strong tensile strength against radial pressure (German Published Application No. 2437199 and Publication No. 2715190). Each of the two parts has two hydraulic cylinder-piston units that support the upper part of the machine and deform the sleeve by pulling the lower part of the machine against the sleeve and pulling it over the sleeve with a drawing die. let Apart from the fact that this device is heavy and cumbersome to handle, its two-part structure requires a large space around the circumference of the reinforcing rods to be connected, so the reinforcing rods must be kept as small as possible. They cannot be placed with limited mutual spacing.

The basic object of the invention is to provide a device which is easy to handle and which makes it possible to perform press sleeve matching of this type even when the reinforcing rods to be connected are arranged at narrow intervals.

This problem is solved in a device of the type mentioned at the outset as follows. That is, a cylinder/piston unit that causes relative motion is arranged as a tension cylinder eccentrically to one side with respect to the drawing die, and at least one other cylinder/piston unit is arranged eccentrically on one side with respect to the drawing die as viewed from the cylinder/piston unit. , a cylinder-piston unit is arranged as a balance cylinder, on which the compressive agent acts in the opposite direction to that in the case of a tension cylinder.

It is advantageous for the tension cylinder to be provided with two cylinder-piston units, which are arranged symmetrically on either side of the plane of action of the resulting force. Advantageously, the piston area of the drawing cylinder and the piston area of the opposing cylinder are inversely proportional to the distance from it to the axis of the drawing die.

The upper part of the machine can be provided with a fork-like bracket for bearing against the sleeve.
Advantageously, the bracket is provided with a support sleeve capable of frictional and non-frictional engagement with the bracket, which support sleeve may consist of two shell-shaped parts surrounding the reinforcing rod, these two shell-shaped parts surrounding the reinforcement bar. Each of the two parts has a flange-like extension at the upper end. The two parts of the support sleeve with this flanged extension can be connected to the bracket for rotation about an axis parallel to the axis of the drawing die, in which case the two parts of the support sleeve are placed in the closed state. A spring can be provided to keep it in place.

The lower part of the machine advantageously has a base plate connected to the tension cylinder and the counter cylinder, on the end face of which a drawing die is arranged.

Advantageously, the substrate is constructed in the form of a fork with a longitudinal slit, the inner end of which is provided with a drawing die. The drawing die itself can be inserted into a cutout in the substrate that enlarges the longitudinal slit. Advantageously, the drawing die consists of at least two annular parts. These two parts complement each other to form a closed annular cross-section and, in particular, consist of two parts with different arc lengths, the shorter inner part of which can be removed, for example by means of a screw. It is possibly fixedly coupled to the substrate, and the longer outer portion is loosely insertable into a cutout in the substrate. Advantageously, the outer part has a shoulder on its underside, by means of which it projects into a corresponding bearing at the front end of the base plate.

The drawing die can also be configured as a two-part holding claw. The two parts, at one end, correspond to each other and complement each other to form a whole cross-section,
It has a notch for forming a drawing die for deforming the sleeve, and the other end is held at the bottom of the machine.

The outer surface of these parts of the retaining pawl is tapered in a wedge-shaped manner, in particular over part of its length, and rests on a corresponding structural contact surface of the receptacle provided in the base plate.

The retaining pawl can be fixed to the substrate in the actuation direction. A threaded bolt acting in the sliding direction can be provided for fixing the retaining pawl. This threaded bolt works together with a corresponding hole in the retaining pawl.

Advantageously, the retaining pawl itself has a stop formed by a shoulder to limit the depth of its sliding relative to the base plate.

The cutouts in the two parts of the retaining pawl for forming the drawing die can be lined with inserts made of wear-resistant material. Advantageously, these inserts are replaceable.

The piston rod of the tension cylinder and the piston rod of the counter cylinder are advantageously fixedly connected to the base plate, for example by means of screws.

The compressive agent conduit is located on the underside of the piston on the one hand,
It communicates with a part of the cylinder chamber of the tension cylinder and, on the other hand, with a part of the cylinder chamber of the counter cylinder above the piston.

The cylinder chamber of the cylinder/piston unit is
Conveniently, it is provided within a single cylinder casing forming the upper part of the machine. However, these units can also each be mounted on a base plate and can be connected to this base as well as to the top cover plate, for example by means of screws. In this case, it is expedient to provide a reinforcing plate in the plane of action of the force combination. Advantageously, this reinforcing plate is also fixedly connected to the base plate and the cover plate, for example by welding or screwing.

A support handle can be attached to the top of the machine.

The basic idea of this invention is that a cylinder/piston unit is arranged symmetrically with respect to the axis of a reinforcing rod connected to the die, which causes a relative movement between the lower part of the machine that has a drawing die and the upper part of the machine that is supported on a sleeve. The goal is not to do this, but to make it eccentric to one side. If the force action is eccentric, a so-called counter cylinder is provided in order to be able to absorb the large bending moments resulting from the eccentricity. This opposing cylinder is subjected to a compression action in the opposite direction to the tension cylinder, resulting in a bending moment acting in the opposite direction, which bending moment is caused by the tension cylinder being arranged eccentrically with respect to the action of the force. compensate for the bending moment. In this way, the device, on the one hand, rests against the reinforcing rods to be connected, and in each case reduces the unit that rests on the reinforcing rods and sleeves to be connected to the absolutely necessary smallness or slenderness for the force application. It becomes possible to configure. These components can be easily attached to the device as a bracket wide enough to fit into the hollow space between the two reinforcing bars.

The figures showing examples will be described in more detail.

The device 1 shown in FIGS. 1 to 4 essentially consists of a machine upper part 2 and a machine lower part 3. The upper and lower parts of these machines are interconnected by a cylinder-piston unit by means of which they can be moved in relative directions.

The upper part of the machine 2 has a cylinder chamber 5 of a tension cylinder 6.
It consists of a one-part cylinder casing 4 in which the cylinder chamber 7 and the cylinder chamber 7 of the opposing cylinder 8 are passed through. Inside the cylinder chamber 5, the piston rod 10
In the cylinder chamber 7, the piston rod 11 moves.

The cylinder casing 4 has a fork-shaped additional bracket 12 (FIG. 2) by means of which the device 1 surrounds one of the reinforcing rods 13, 14 to be connected in each case, as shown in chain lines. The illustrated still can be pushed into the hollow space between adjacent reinforcing rods to be connected. A sleeve 15 is fitted over the reinforcing rods 13 and 14. This sleeve must be reliably connected to the reinforcing rods 13, 14 by the device 1 by radial deformation.
The reinforcing rods 13 and 14 are provided with surface protrusions. These protrusions can be in the crescent shape known from ordinary deformed steel bars for concrete. However, it can also be formed from hot-rolled binding. These tassels follow a spiral,
Form a thread.

A support sleeve 16 is operatively connected to the bracket 12. The support sleeve 16 has a lower portion 17 by which the support sleeve bears on the upper end of the sleeve 15 and a flange-shaped extension by which the support sleeve 16 is fixed to the bracket 12 in a non-frictionally engaging manner. head 1 formed by
It consists of 8. The entire support sleeve 16 consists of two shell-shaped parts 17', 18', 17'', 1
8'' (Fig. 5), and these shell-shaped parts are fixed along the bracket 12 so as to be rotatable in the direction of the arrow 20 about the bolt 19. This occurs against the action of the spring 21. Said flat spring is pressed laterally to the outside of the bracket 12 by means of a pressing piece 22 and a screw 23.

Shell portion 18' of the head of support sleeve 16
and 18 have end faces that are surface 24. This side 24
The device is attached to the sleeve 1 together with the bracket 12.
5 can be slid on the reinforcing rod 13. In this case, the two shell-shaped parts of the support sleeve 16 open and close, taking the reinforcing rod 13 therein. In the closed position, the two shell-shaped parts of the support sleeve 16 can be locked by adjusting bolts 25 (FIG. 6). Said adjusting bolt is guided in a hole 26 in the bracket 12 and is inserted into a hole 27 in the shell parts 18', 18''.A plate 28 is screwed as a consumable part on the underside of the bracket 12. .

FIG. 2a shows only a cross section of a further embodiment of the device shown in FIG. In this example, instead of the tension cylinder 6, two tension cylinders 6a and 6b are provided adjacent to each other symmetrically with respect to the longitudinal axis of the device. Cylinder chambers 5a and 5b correspond to these tension cylinders 6a and 6b. Opposed cylinder 8
A has a cylinder chamber 7a as in the example shown in FIG.

In the embodiment according to FIG. 1, the machine lower part 3 consists of a base plate 29 with a blind hole 30. This blind hole has a tension cylinder 6 and an opposite cylinder 8.
The piston rods 10 and 11 are inserted and fixed by end screws 31. The substrate 29 has an enlarged front region 32 (FIG. 3). The front end 33 is fork-shaped by a longitudinal slot 34 and serves to accommodate a drawing die 35.

The drawing die 35 is composed of two annular parts, a short inner part 36a and a long outer part 36b. These portions 36a, 36b are inserted into recesses 66 in the substrate 29. On the board 29,
For example, the screwed inner part 36a creates an opening in the outer part 36b such that:
That is, the device must be large enough to be slid from the side over the reinforcing rods to be connected. The outer part 36b is then inserted into the recess 66 (third a
figure). However, the drawing die consists of two split dies 37a, 3.
7b. These mold halves can be removed and inserted each time the device is applied (FIG. 3b).

A further embodiment of the substrate is shown in FIGS. 11 and 12 in longitudinal section and plan view, respectively.

The base plate 29' likewise has a longitudinal slot 34' starting from the front part 33' and having a recess 66. A drawing die 35'' is inserted into the recess.The drawing die 35'' is circular and has a short inner portion 36a' fixed to the substrate 29' by, for example, a single screw. , and a long outer portion 36b' loosely inserted into the recess 66.

Since the annular drawing die 35'' is subjected to excessively large radial forces during plastic deformation of the sleeve, these forces must be absorbed by the fork-shaped base plate 29', but the long section 36
b' has on its underside a shoulder 64 which, in the inserted state of the drawing die, rests on a corresponding shoulder 65 on the front end 33' of the substrate 29' (FIG. 11). This ensures that the radial forces occurring during the drawing die are applied to the substrate 29 only as normal forces in the area of these shoulders 64, 65 and act perpendicularly to the shoulders, so that the substrate The arms of 29' are not expanded and force is applied only in the longitudinal direction.

Importantly, the long part 36b' of the drawing die has on its underside a step 64 which, when the drawing die is inserted, presses against a corresponding step 65 at the front end of the substrate 29'. .
In this way, the radial forces occurring in the drawing die are applied to the substrate 29' in the area of these steps 64, 65 only as normal forces. Because these forces act perpendicularly to the paragraph,
This is because stress is applied only in the longitudinal direction without opening both arms of the substrate 29'.

In order to make a press sleeve joint using the device according to the invention, the device 1 is placed in position after the simultaneous construction of the reinforcing bars 13 and 14 and the installation of the sleeve 15. For this purpose, the device is provided with a handle 38 (FIGS. 1 and 4). The device then rests on the reinforcing rod in such a way that the bracket 12 is located above the sleeve 15 in the following manner. That is, both shell-shaped parts 18', 18'' of the support sleeve 16 surround the sleeve 15 and are therefore in such a position that the shell-shaped parts cannot be closed. 15
It is held in this position by climbing on top of it.
That is, the plate 28 does not fall down. Plate 28 protects aluminum cylinder casing 4 and bracket 12. This plate is made of steel and has a hardened surface, which prevents wear and thereby improves the movement of the two-part support sleeve 16, as well as transferring pressure between the cylinder casing 4 and the bracket 1.
Blend it on the large side of 2. For example, the sleeve 15 has a tightening wire connected to the reinforcing rod 1 just below the sleeve.
It can be held in place by wrapping it around 4. In this position, there remains sufficient space in the area of the machine lower part 3 to insert the annular part 36 of the drawing die 35. When the drawing die 35 is complete, the device 1 is pulled upwards slightly. This ensures that both shell-shaped parts of the support sleeve 16 are connected to the sleeve 15.
1, can be closed around the rod 13 and placed on the sleeve 15, as can be seen in FIG.

Now, the compressive agent flows from the conduit 39 to the arrow 40 (Fig. 1).
It is fed through the cylinder chamber 7 to the compression surface 41 of the piston rod 11 of the opposite cylinder 8 and, by introduction into the lower part of the cylinder chamber 5, hits the piston 9 of the tension cylinder 6 from below. In this way, in addition to the tension force applied via the tension cylinder 6, a compression force is exerted on the opposing cylinder 8.

In that case, the ratio of that of the tension cylinder 6 to the compression surface of the opposing cylinder 8 is the ratio of the reinforcing rod 1 to the spacing a of the opposing cylinder axis to the axes of the reinforcing rods 13, 14.
3, 14 or the distance b between the axis of the drawing die 35 and the axis of the tension cylinder 6. The bending moment released by the opposing cylinder 8 then compensates for the bending moment that occurs during the action of the tension cylinder. As a result, the substrate 29 is pulled gently and uniformly through the sleeve 15 by the drawing die. The sleeve then undergoes plastic deformation.

While the cylinder casing 4 has a robust construction, it is also possible to construct it so that it can be disassembled. An example is shown in FIGS. 7 and 8. The machine upper part 2' has a tension cylinder 42 and a counter cylinder 43 as a single unit connected by a base plate 44. At the upper end cylinders 42 and 4
3 are connected together by a cover plate 45. The connection is by screws 46.

A reinforcing plate 47 is used for mutual tension. This reinforcing plate 47 is connected on the one hand to the cylinder 42 via a connecting plate 48 and to the opposite cylinder 43 via side wings 49. In other respects, especially considering the lower part of the machine, this device has the same construction as the device described in FIGS. 1-4.

In this case, the cylinder-piston units are each mounted on a separate base plate and are connected to this base plate and to the upper cover plate. To support this device, a stiffening plate 47 is provided in the plane of action of the resultant force, ie between the two cylinder-piston units, which stiffening plate is connected to the base plate and the cover plate.

9 and 10 show another embodiment of the lower part of the machine which can be used with the device of FIG. 2a, with two tension cylinders. In this case as well, the machine lower part 3' consists of a base plate 50 which is fixedly connected to the piston rods 10,11.
In this example, a blind hole 51 is provided in the base plate 50 whose outer linkage matches that of the cylinder casing.
The piston rods 10 and 11 are inserted into these holes, and a nut 52 is fitted to the end face.

The substrate 50 has a receiving portion 53 open from the end surface side, and the holding claw 5 is inserted into this receiving portion.
This retaining claw 54 has two elongated parts 54' and 54.
These parts have cutouts 55 at their thicker ends, which in common form a circular cross section, into which a drawing die 56 is inserted. There is. The drawing die 56 consists of two approximately semi-circular parts which are inserted as consumable parts in a replaceable manner into both parts of the retaining pawl (FIG. 9).

These two parts 54' and 54'' form a wedge-shaped contact surface 57 and a narrow end 58, in which a hole 59 is provided from the rear end face into which a threaded bolt can be inserted. 60 can be screwed in. This threaded bolt can be moved via a knurled handle 61 by which the retaining pawl 54 is moved into the receiving part 5.
3, the upper and lower shoulders 62 can be retracted until they contact the end surface 63 of the substrate 50. In this way, the holding claw 54 can be retracted. In this way, the retracting depth of the holding claw 54 is limited, and the tension cylinder 10, 10' and the reinforcing rod 13, 14 are always kept at a constant distance b and the opposing cylinder 1
1 and the distance a between the axes of the reinforcing rods 13 and 14 is guaranteed.

From FIG. 13, it can be seen that the substrate has a longitudinal slit 34' provided in the axial direction on the end surface side, and that the front part of this substrate is formed lower than the surface;
As a result, a housing portion 66 is formed, and it can be seen that the rear portion of this housing portion has a cylindrical wall. A two-part drawing die 13 is inserted into this receptacle.

In addition to being a one-part base plate with a longitudinal slot, the lower part of the machine can also be a two-part holding claw 54. The two parts have at one end mutually corresponding cutouts 55 forming drawing dies.
These cutouts complete one entire cross section. An important feature of the invention is that a drawing die must be mounted in the lower part of the machine, which drawing die forms a closed ring that absorbs radial forces. Since this ring must be closed in place around a reinforcing rod that has already been concreted into the building, the lower part of the machine must be able to come into contact with the reinforcing rod. This can be done by sliding the lower part of the machine, which has a longitudinal slit, on a reinforcing rod, and then inserting the longer part of the drawing die from above, or
Alternatively, this can be achieved by previously closing both parts of the retaining claw around the reinforcing rod, then inserting it into the lower part of the machine and fixing it there with a threaded bolt 60 and a knurled handle 61.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view of a first embodiment of the apparatus of the present invention, FIG. 2 is a cross-sectional view taken along the line - in FIG. 1, and FIG. 2a is a similar cross-sectional view of another embodiment. , Figure 3 is a cross-sectional view taken along line - in Figure 1;
Figures a and 3b are detailed views of different configurations of the drawing die, Figure 4 is a front view taken along the line - in Figure 1;
5 is a view of the upper part of the machine seen from below along the line - in FIG. 1; FIG. 6 is a side view of the lower region of the upper part of the machine; and FIG. 7 is a machine of another embodiment of the device according to the invention. 8 is a longitudinal sectional view of the upper part corresponding to FIG. 1, FIG. 8 is a cross sectional view taken along the line - in FIG. 10 is a cross-sectional view taken along line - in FIG. 9, FIG. 11 is a longitudinal sectional view of another embodiment of the substrate for the lower part, and FIG. 12 is a plan view of the substrate in FIG. 1
FIG. 3 is a detailed view of the lower part of the machine, and FIGS. 14 and 15 are views showing the drawing dies, respectively. Symbols in the figure 1...Device, 2...Machine upper part, 3...Machine lower part, 4...Cylinder casing, 5, 7, 7a...
Cylinder chamber, 6, 6a, 6b, 42... tension cylinder, 8, 8a, 43... opposing cylinder, 9... piston, 10, 11... piston rod, 12... bracket, 13, 14... reinforcing rod, 15... sleeve, 16
...Support sleeve, 18...Head, 17', 18',
17″, 18″…shell shaped part, 19…bolt, 2
1... Spring, 22... Pressing piece, 23, 46... Screw, 2
5... Adjustment bolt, 26, 27... Hole, 28... Plate, 2
9,44,50...board, 30,51...blind hole,
31... End thread, 32... Neck region, 33... Front end, 34... Longitudinal slit, 35, 35'', 56...
Drawing die, 36... annular portion, 37a, 37b...
Split mold, 38... Handle, 39... Conduit, 41... Compression surface, 42, 43... Cylinder, 45... Cover plate, 47... Reinforcement plate, 48... Joint plate, 52... Nut,
53... Receiving part, 54... Holding claw, 57... Contact surface,
58... Narrow end, 59... Hole, 60... Threaded bolt,
61...Knurled handle, 62...Shoulder, 6
3...End face.

Claims (1)

[Claims] 1. A device for abutting and joining two reinforcing rods having protrusions on their surfaces with a sleeve, the upper part of the machine acting parallel to the axis of the reinforcing rods and pressing down on the sleeves. A plurality of cylinder/piston units are provided, and a drawing die is provided at the bottom of the machine.During the relative movement between the drawing die and the sleeve caused by the operation of the cylinder/piston units, the sleeve moves into this drawing die. In the device, which is pressed against the end of the reinforcing rod by the tensioning cylinder 6, 6a, 6b, the cylinder-piston unit that causes the relative movement is arranged eccentrically to one side with respect to the drawing die 35, On the opposite side of the drawing die 35 when viewed from the cylinder/piston unit, there is at least one other cylinder/piston unit on which the compressive agent acts from the direction opposite to that in the case of the tension cylinder.
8a. 2. In the device according to claim 1, two cylinder-piston units are provided as the tension cylinders 6a and 6b, and these units are arranged symmetrically with respect to both sides of the action plane of the resultant force applied. A device characterized by: 3. In the device according to claim 1 or 2, the piston areas of the tension cylinders 6, 6a, 6b and the piston areas of the opposing cylinders 8, 8a are inversely proportional to the distance from the axis of the drawing die 35. A device featuring: 4. The device according to claim 1, wherein a fork-shaped bracket 12 for supporting the machine upper part 2 consisting of a cylinder casing 4 with a one-part cylinder-piston unit against the sleeve 15. A device characterized by having: 5. A device according to claim 4, characterized in that there is provided along the bracket 12 a support sleeve 16 having a smaller diameter than the drawing die and capable of frictionally and non-frictionally engaging the bracket. 6. The device as claimed in claim 5, in which the support sleeve 16 consists of two shell-shaped parts 16', 16'' surrounding the reinforcing rod, each of these two parts having a flange-shaped extension at the upper end. A device characterized in that it has sections 18', 18''. 7. The device according to claim 6, in which the two shell-shaped parts 16', 1 of the support sleeve 16
6'' is attached to the fork-shaped bracket 12 by means of flange-shaped extensions 18', 18'' and to the drawing die 35.
A device characterized in that an axis parallel to the axis of is rotatably connected. 8. In the device according to claim 7,
A device characterized in that a spring 21 is provided to keep the two parts 16', 16'' of the support sleeve 16 closed. 9. The device according to claim 1, wherein: , the lower part 3 is composed of a substrate 29,
The device is characterized in that the substrate is connected to tension cylinders 6, 6a, 6b and opposing cylinders 8, 8a, and that drawing dies 35, 35', 35'' are provided on the end face side of the substrate. In the device according to scope 9,
The substrates 29, 29' are constructed in the form of a fork with longitudinal slits 34, 34', and drawing dies 35, 35', 3 are provided at the inner ends of the longitudinal slits.
11. In the device according to claim 10, a substrate 29 for enlarging the longitudinal slits 34, 34';
The drawing dies 35, 35', 3 are inserted into the notch 66 of 29'.
12. The device according to claim 10 or 11, in which the drawing dies 35, 35', 35'' complement each other closed annular cross-sections. at least two annular portions 36a, 36b, 36a', 36b', 3
7a and 37b. 13 In the device according to claim 12, the drawing dies 35, 35'' are composed of two parts with different arc lengths, and the shorter inner part 36a, 36a' of the two parts is removably fixed to the substrate 2, for example by screws.
9, 29' and the long outer part 3
6b, 36b' are loosely connected to the notches 6 of the substrates 29, 29'.
6. A device characterized in that it is insertable into a 14. The device as claimed in claim 13, in which the outer part 36b' has a shoulder 64 on its underside, with which it rests against a corresponding bearing 65 on the front end 33' of the base plate 29'. A device characterized by: 15. In the device according to claim 9,
A drawing die 56 is formed along the two-part retaining pawl 54, the retaining pawl portions 54', 5
4'' has at one end a mutually corresponding cutout 55 for forming a drawing die 56 used for the deformation of the sleeve 15, which complements one complete cross section.
and is held at the other end 58 in the lower part 3' of the device. 16. The device according to claim 15, wherein the outer surface of the portions 54, 54' of the retaining pawl 54 tapers into a wedge shape over a part of its length, and the receiving portion 53 formed in the base plate 50 The device is characterized in that it rests on a correspondingly formed contact surface 57 of the device. 17. The device according to claim 15 or 16, characterized in that the holding claws 54 are fixable to the substrate 50 in the working position. 18. The device according to claim 17, in which a threaded bolt 60 acting in the sliding direction is provided for fixing the retaining pawl 54, and this bolt is configured to work together with a corresponding hole in the retaining pawl 54. A device characterized by: 19. In the device according to any one of claims 9 to 18, it is provided that the retaining pawl 54 has a stop formed by a shoulder 62 for limiting the sliding depth with respect to the substrate 50. Featured device. 20. In the device according to any one of claims 9 to 19, the parts 54', 5 of the retaining claw 54
21. A device according to claim 20, characterized in that the 4" cutout 55 is lined with an insert made of wear-resistant material to form a drawing die 56. 22. A device according to any one of claims 1 to 21, characterized in that the piston rods 10, 10a, 10b of the tension cylinders 6, 6a, 6b, The piston rods 11 of the installed cylinders 8, 8a are attached to the base plates 29, 30,
A device characterized in that it is fixedly connected, for example by screwing. 23. The device according to claim 1, wherein the tension cylinder 6, 6a, 6 has a compressive agent conduit 39 on the underside of the piston 9.
A device characterized in that it is connected to the part of the cylinder chamber 5 of b on the one hand and to the part of the cylinder chamber 7 of the opposite cylinder 8, 8a above the piston on the other hand. 24. In the device according to any one of claims 1 to 23, the cylinder chambers 5, 5a, 5b, 7, 7a of the cylinder-piston unit are provided in a single cylinder casing 4 constituting the upper part 2 of the machine. A device characterized by: 25. The device according to any one of claims 1 to 23, in which the upper part of the machine consists of individual cylinder-piston units, each of which is arranged on a base plate 44, with the upper part being connected to the upper part of the machine. A device characterized in that it is connected to the cover plate 45, for example by screws. 26. In the device according to claim 25, a reinforcing plate 47 is arranged in the plane of action of the force combination, and this reinforcing plate is fixedly connected to both the base plate 44 and the cover plate 45, for example by welding or screwing. A device characterized by: 27. The device according to any one of claims 1 to 26, in which a support handle 38 is provided on the machine upper part 2.
A device characterized in that it is provided with.